Machine for sawing shingles



(No Model.) 3 Sheets-Shea 1.

G. J. DAVIS. MACHINE FOR SAWING SHINGLES'.

No. 404,827. H Patented June 11, 1889.

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(No Model.) 3 Sheets-Sheet 3. G. J. DAVIS.

MACHINE FOR SAWING SHINGLES.

Patented June 11, 1889.

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UNITED STATES PATENT OFFICE.

GEORGE J. DAVIS, OF MILL RAY, ASSIGNOR OF ONE-HALF TO IVILLIAM D. DAVIS, OF STATESBOROUGH, GEORGIA.

MACHINE FOR SAWING SHINGLES.

SPECIFICATION forming part of Letters Patent No. 404,827, dated June 11, 1889.

Application filed August 29, 1888. Serial No. 284,068. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE J. DAVIS, a citizen of the United States, residing at Mill Ray, in the county of Bulloch and State of Georgia, have invented a new and useful Improvement in Machines for Sawing Shingles, of which the following is a specification.

My invention relates to an improvement in machines for sawing shingles; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a top plan view of a shingle-sawing machine embodying my improvements. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical longitudinal sectional view taken on the line no 00 of Fig. 1. Fig. 4 is a transverse vertical sectional view taken on the line y y of Fig.

1. Fig. 5 is a detailed perspective view.

A represen s four vertical corner-posts, which are connected at their upper ends by longitudinal beams B, are connected at their lower ends by longitudinal beams O, and are also connected by means of transverse crossbeams D and E. The beams B are connected at their centers by means of a cross-beam F.

G represents a longitudinal bar, which connects the beam F, near one end, with one of the cross-beams D, and the central portion of the said bar G is provided on its under side with'a depending offset H. From the rear side of the said offset projects a horizontal spindle I.

K represents a tilt-table, which is provided near its inner edge, at its center, with a depending arm or bracket L, which is pivotedv on the spindle I, and thereby the tilt-table is adapted to rock on the beam G in a longitudinal direction and to be inclined first in one direction and then in the opposite direction.

M represents a pair of adjusting -screws, which work in vertical openings in the bar G, and the upper ends of which are adapted to limit the play or rocking motion of the tilttable. The latter is provided near its center, on its front edge, with a vertical arm N, the sides of which are oblique and converge rearward to a point, as shown in Fig. 1.

of the said arm is adapted to slide back and forth 011 the guide P.

T represents a bar of suitable length, which is arranged parallel with the arm S, at the free end thereofand on its rear side, and is connected to the said arm S by means of transverse blocks U, V, and W. The space between the blocks U and V is longer than the space between the blocks V and W, andis somewhat-in excess of the length of the saw-table. The arm S, the bar T, and the transverse blocks U, V, and NV constitute a carriage X.

Y represents a yoke, which is arranged near the bottom of the carriage, at the inner end thereof, bears against the block U, and has its arms secured to the arm S and bar T.

Z represents a pair of longitudinally-movable dogs, which are guided in openings in the blocks V WV and have their inner ends bent .downward at right angles and then extended their outer ends with burrs or nuts A.

B represents coiled extensile springs, which are placed on the dogs and bear between the block W and the burrs or nuts A, the func-' tion of the said springs being to normally force the dogs inward.

In the outer end of the arm S is fulcrumed a lever G, the outer end of which is provided with an anti-friction roller D, that is adapted to come in contact with the stop-plate 0 when the carriage is moved forward, and the inner end of said lever is connected to the dogs by means of a link E.

F represents a longitudinally-movable rod, which has its ends supported in guides G,

that are secured to the front side of the arm S. Projecting from the front side of the rod F is a tappet-arm H, and also projecting from the said rod F is the right-angled arm I, that is guided in a keeper K on the upper side of arm F, and has its upper end adapted to be grasped and used as a handle, whereby the rod F may be moved longitudinally in one direction. A spring L is secured on the rear side of the carriage and engages the arm I, the function of the said spring being to retain the said rod F normally in the position shown in solid lines in Fig 1.

M represents the saw-arbor, which is arranged in a vertical position, and is journaled in bearings N, that are secured to the rear side of the frame. To the upper end of the saw-arbor and above the frame is secured a circular saw 0, one edge of which is adjacent to the tilt-table.

The operation of my invention is as follows: Theblock from which the shingles are to be sawed is placed in the carriage, with one end resting against the sharpen ed edge of the yoke Y and the opposite edge thereof engaged by the points of the dogs. \Vhen the carriage is moved forward, the lever C is turned by means of its roller I) coming in contact with the stop-plate O, and said lever serves to withdraw the dogs from the block, so as to release the latter and cause the same to fall upon the table. At the forward motion of the carriage the tappet-arm ll of rod F e11- gages one oblique side of the arm N, and causes the latter to tilt or incline the table to the desired degree, and the block being supported on the said table said block is thereby arranged at the correct inclination with regard to the proximate edge of the saw. The latter being in rapid rotation, the operator, by grasping the keeper K,which serves as a handle, moves the carriage rearward, so as to cause the block to be presented to the saw, and the latter saws a shingle from the bottom of the block, as will be readily understood. As the carriage recedes from the front side of the frame, the lever 0 becomes gradually disengaged from the stop-plate O, and the springs B serve to force the dogs inward and cause them to become engaged with the block and hold the latter firmly in place in the carriage. At the next succeeding forward motion of the carriage the operator grasps the handle of the arm I and moves the rod F a slight distance against the tension of the spring Ii, so as to cause the tappet-arm II to engage the opposite side of the arm N from that which is previously engaged by said tappet-ar1n, and thereby cause the saw-table to be inclined in the opposite direction, and consequently incline the block also in the opposite direction, and thereby cause the thick end of the shingles to be sawed first in one end and then in the opposite end of the block.

As each shingle is sawed from the under side of the block, it drops from the saw and clears the saw-table, as will be readily understood.

Having thus described my invention, I claim- 1. The combination of the frame, the saw, the carriage guided on the frame and adapted to be moved across and from the saw, the longitudinally-movable rod sliding in guides on the carriage, the tappet-arm, and the tilttable having the cam or arm M, adapted to be engaged by the tappet-arm, for the purpose set forth, substantially as described.

2. The combination, in a machine for sawing shingles, of the frame having the stop 0, the pivoted carriage movable toward and from the saw, the dogs Z in the said carriage, for the purpose set forth, the springs 13 on the shanks of the dogs to normally move the said, dogs in one direction, and the lever C, pivoted to the carriage and connected to the said dogs, and having the roller I), adapted to engage the stop 0 as the carriage is withdrawn from the saw, whereby the dogs will become disengaged, substantially as described.

3. The combination, in a machine for saw-- ing shingles, of the frame, the tilting table supported thereon and having the arm N, the screws M, to limit the movement of the tilting table, the carriage, and the longitudinallymovable rod F, guided thereon and lraving the tappet-arm to engage the arm N, substan tially as described.

4. The combination, in a machine for sawing shingles, of i the frame, the tilt table thereon having the arm N, the carriage, the longitu(linally-movable rod F on the carriage, having the tappet-arm II, the handle to move the rod in one direction, and the springL, to move the rod normally in the opposite direction, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aliixed my signature in presence of two witnesses.

GEORGE .T. DAVIS.

Witnesses:

R. Y. LANE, J. E. (l. TILLMAN. 

